Topic
Stress field
About: Stress field is a research topic. Over the lifetime, 11926 publications have been published within this topic receiving 226417 citations.
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TL;DR: In this paper, three crustal sections, located in key zones of the Calabrian Arc and Southern Apennines, have been drawn on the basis of the available geological, geophysical, seismological and volcanological data.
74 citations
TL;DR: In this paper, the authors present a predictive model of flatness defects, which appear during rolling of thin plates, the origin of which is the roll stack thermo-elastic deformation.
74 citations
TL;DR: In this article, a simple model is proposed to explain the regional stress pattern of the Indian and Eurasian plate collision, and the trajectories of the stress axes along the transcurrent faults and the Eastern Himalayan Front are approximately N-S, parallel to the relative motion of the two plates.
74 citations
01 Apr 1981
TL;DR: In this article, a static strength methodology and evaluations of joint static and fatigue test data are reported, and correlations with analytic predictions are included, relative to joint strength and failure mode.
Abstract: : Static strength methodology and evaluations of joint static and fatigue test data are reported. Analytic studies complement methodology development and illustrate: the need for detailed stress analysis, the utility of the developed 'Bolted Joint Stress Field Model' (BJSFM) procedure, and define model limitations. For static strength data, correlations with analytic predictions are included. Data trends in all cases are discussed relative to joint strength and failure mode. For joint fatigue studies, data trends are discussed relative to life, hole elongation, and failure mode behavior.
74 citations
TL;DR: In this paper, a mesoscale model was proposed to capture the co-operative interaction between microcracks in the transition from distributed to localized damage in low-porosity granite.
Abstract: An understanding of the influence of temperature on brittle creep in granite is important for the management and optimization of granitic nuclear waste repositories and geothermal resources. We propose here a two-dimensional, thermo-mechanical numerical model that describes the time-dependent brittle deformation (brittle creep) of low-porosity granite under different constant temperatures and confining pressures. The mesoscale model accounts for material heterogeneity through a stochastic local failure stress field, and local material degradation using an exponential material softening law. Importantly, the model introduces the concept of a mesoscopic renormalization to capture the co-operative interaction between microcracks in the transition from distributed to localized damage. The mesoscale physico-mechanical parameters for the model were first determined using a trial-and-error method (until the modeled output accurately captured mechanical data from constant strain rate experiments on low-porosity granite at three different confining pressures). The thermo-physical parameters required for the model, such as specific heat capacity, coefficient of linear thermal expansion, and thermal conductivity, were then determined from brittle creep experiments performed on the same low-porosity granite at temperatures of 23, 50, and 90 °C. The good agreement between the modeled output and the experimental data, using a unique set of thermo-physico-mechanical parameters, lends confidence to our numerical approach. Using these parameters, we then explore the influence of temperature, differential stress, confining pressure, and sample homogeneity on brittle creep in low-porosity granite. Our simulations show that increases in temperature and differential stress increase the creep strain rate and therefore reduce time-to-failure, while increases in confining pressure and sample homogeneity decrease creep strain rate and increase time-to-failure. We anticipate that the modeling presented herein will assist in the management and optimization of geotechnical engineering projects within granite.
74 citations